Based on the morphology of the hand phalanx, Orrorin tugenensis lived in a: July 30, 2017 Anthropology Based on the morphology of the hand phalanx, Orrorin tugenensis lived in a: a. dry savannah b. cave c. open grasslands d. forest environment e. desert Answer: D Learn More : Share this Share on FacebookTweet on TwitterPlus on Google+